Problem
Well the problem is of course your nested foreach loop. Because for each element of your $data1
array you loop through the entire $data2
array (So in total there are $data1
* $data2
iterations).
Solutions
To solve this you have to loop through both arrays at once.
You can do this with array_map()
and pass all arrays to it which you want to loop through at the same time.
array_map(function($v1, $v2){
echo $v1 . "<br>";
echo $v2 . "<br><br>";
}, $data1, $data2 /* , Add more arrays if needed manually */);
Note: If the amount of elements are uneven you won't gen any errors, it will just print NULL
(Means you won't see anything)
Use a MultipleIterator
and attach as many ArrayIterator
as you need.
$it = new MultipleIterator();
$it->attachIterator(new ArrayIterator($data1));
$it->attachIterator(new ArrayIterator($data2));
//Add more arrays if needed
foreach($it as $a) {
echo $a[0] . "<br>";
echo $a[1] . "<br><br>";
}
Note: If the amount of elements are uneven it will just print all values where both arrays still have values
for loop
method (PHP >=4.3)
Use a for loop with a counter variable, which you can use as key for both arrays.
$keysOne = array_keys($data1);
$keysTwo = array_keys($data2);
$min = min(count($data1), count($data2));
for($i = 0; $i < $min; $i++) {
echo $data1[$keysOne[$i]] . "<br>";
echo $data2[$keysTwo[$i]] . "<br><br>";
}
Note: Using array_keys()
is just so that this also works if the arrays don't have the same keys or are associative. min()
is used to only loop through as many elements as every array has
Or if the arrays only have unique values, you can array_combine()
both arrays, so that $data1
can be accessed as key and $data2
as value.
foreach(array_combine($data1, $data2) as $d1 => $d2) {
echo $d1 . "<br>";
echo $d2 . "<br><br>";
}
Note: The arrays must have the same amount of elements, otherwise array_combine()
will throw an error
If you want to print more than 2 arrays at the same time or just an unknown amount of arrays, you can combine the array_map()
method with a call_user_func_array()
call.
$func = function(...$numbers){
foreach($numbers as $v)
echo $v . "<br>";
echo "<br>";
};
call_user_func_array("array_map", [$func, $data1, $data2]);
Note: Since this kinda uses the array_map()
method, it behaves the same with uneven amount of elements. Also since this method only works for PHP >=5.6 you can just remove the arguments and change out $numbers
with func_get_args()
in the foreach loop and then it also works for PHP >=5.3